Huge improvement in water quality and payback in less than a year
Since installing a Hanovia UV water treatment system, the Lloyd Elsmore Park Leisure Centre in Manukau City, New Zealand, has seen a transformation in water and air quality at its indoor leisure pool, one of New Zealand’s busiest. Running costs are also much less and the UV system has paid for itself in less than a year.
“We installed the Hanovia UV system to control combined chlorine, also known as chloramines,” commented Centre Manager Gary Burr. “Since installation it has been doing its job perfectly – combined chlorine levels have fallen from 1.8ppm to 0.5ppm, resulting in a much improved pool environment. Visitors have really noticed the difference and we are always getting comments about how much nicer the pool is to swim in, with none of the nasty ‘chlorine’ smells and eye irritations normally associated with indoor pools. People find they no longer need to use eye goggles and don’t smell of chlorine when they leave the pool. The water is also much clearer – transmission has shot up from 80% to 95% - from cloudy to clear.”
Continuing, Gary said, “Other benefits include a big reduction in the amount of dilution water required. Before UV we were replacing about 600m3/water per week, just to keep combined chlorine levels down, and this has now fallen to virtually zero – it’s just not necessary any more. All in all, the reduction in costs for new water, discharged water, lost energy and lost chemicals is considerably lower. The UV paid for itself within less than a year, making this a doubly successful story.”
He concluded by saying, “Following the success of the Lloyd Elsmore Park UV installation, Manukau City Council has ordered two more Hanovia UV systems for other leisure facilities with similarly loaded indoor pools. I know for a fact that the Council has also received many more enquiries, based on the success of our installation.”
The UV system unit installed at Lloyd Elsmore Park is a Hanovia medium pressure PSP UV system, which can treat up to 220 m3/hour, based on a UV dose of 60 mJ/cm2. An automatic wiper keeps the sleeve housing the UV lamp clean, so the only regular maintenance required is changing the lamp every nine to twelve months – a simple operation that is carried out by on-site staff. All Hanovia UV disinfection systems are compact and can usually be installed within existing pipework with minimal disruption.
All Hanovia medium pressure UV systems are compact and can usually be installed within existing pipework. Automatic wipers keep the quartz sleeves housing the UV lamps clean, so the only regular maintenance required is changing the lamp, a simple operation that can be done in minutes. Reduced chlorine usage also results in significant cost savings for the pool operator, as well as cutting down on chemical handling.
